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- <?php
- /*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- namespace Symfony\Component\Mime\Encoder;
- /**
- * @author Lars Strojny
- */
- final class QpContentEncoder implements ContentEncoderInterface
- {
- public function encodeByteStream($stream, int $maxLineLength = 0): iterable
- {
- if (!\is_resource($stream)) {
- throw new \TypeError(sprintf('Method "%s" takes a stream as a first argument.', __METHOD__));
- }
- // we don't use PHP stream filters here as the content should be small enough
- if (stream_get_meta_data($stream)['seekable'] ?? false) {
- rewind($stream);
- }
- yield $this->encodeString(stream_get_contents($stream), 'utf-8', 0, $maxLineLength);
- }
- public function getName(): string
- {
- return 'quoted-printable';
- }
- public function encodeString(string $string, ?string $charset = 'utf-8', int $firstLineOffset = 0, int $maxLineLength = 0): string
- {
- return $this->standardize(quoted_printable_encode($string));
- }
- /**
- * Make sure CRLF is correct and HT/SPACE are in valid places.
- */
- private function standardize(string $string): string
- {
- // transform CR or LF to CRLF
- $string = preg_replace('~=0D(?!=0A)|(?<!=0D)=0A~', '=0D=0A', $string);
- // transform =0D=0A to CRLF
- $string = str_replace(["\t=0D=0A", ' =0D=0A', '=0D=0A'], ["=09\r\n", "=20\r\n", "\r\n"], $string);
- switch (\ord(substr($string, -1))) {
- case 0x09:
- $string = substr_replace($string, '=09', -1);
- break;
- case 0x20:
- $string = substr_replace($string, '=20', -1);
- break;
- }
- return $string;
- }
- }
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